Monograph no. 41

The evaluation involved a mixed methodology, where review and a qualitative component guided the development of a survey to assess the deterrent effect of random breath testing (RBT) and random drug testing (RDT), and a quantitative component measured the influence of various law enforcement practices on a driver’s decision to drink/drug drive. In order to ascertain aspects of law enforcement practice that have the greatest deterrence value to drivers, analysis on Australia-wide data was performed. The project focused on identifying which law enforcement practices have the greatest deterrent effect on drivers who consume alcohol and/or drugs, and who indicate they are likely to drink drive and/or drug drive in the future from the driver’s perspective.